TRANSIENT CHARACTERISTICS (See Figures 2, 3 and 4):

PARAMETER

SYMBOL

MIN

TYP

MAX

UNI T

CONDITION

SYNC Frequency

40

-

70

Hz

-

EXT, SENS/ Touch Duration

67

-

infinite

ms

60Hz

80

-

infinite

ms

50Hz

TRIG/ pulse width (see Note 2)

-

130

-

µs

60Hz

-

156

-

µs

50Hz

Conduction Angle

ø

45

-

159

deg

-

ø incremental steps

∆

ø

-

1.4

-

deg

-

(Note 1)

On/Off slew rate

-

1.4

-

deg/33.33ms

60Hz

-

1.4

-

deg/40ms

50Hz

Note 1: Total number of steps = 82.

DC ELECTRICAL CHARACTERISTICS:

PARAMETER

SYMBOL

MIN

TYP

MAX

UNIT

CONDITION

Supply voltage

4.5

5.0

5.5

V

-

Supply current

-

300

400

µA

SYNC Lo

-

-

2.1

V

-

SYNC Hi

2.9

-

-

V

-

BCV input:

Dynamic Voltage Range

Vb

1.25

-

4.4

V

Voltage increment per step

∆

Vb/∆ø

-

39

-

mV

∆

EXT, SENS/ Lo

-

-

1.5

V

-

EXT, SENS/ Hi

3.5

-

-

V

-

TRIG/ Lo

-

0.2

-

V

-

TRIG/ Hi

-

5.0

-

V

-

TRIG/ Sink Current

35

-

-

mA

7642-042908-2

ABSOLUTE MAXIMUM RATINGS:

PARAMETER

SYMBOL

VALUE

UNIT

DC supply voltage

+7

V

Any input voltage

V

Operating temperature

0 to +90

o

C

Storage temperature

-65 to +150

o

C

TRIG/ (Pin 8) The TRIG/ can be turned on or off by applying the active

logic level at either the SENS/ or the EXT input for a brief duration. In

the Off state, the TRIG/ sits at steady high level turning off the triac in

series with the lamp. In the On state, the TRIG/ outputs a low going

pulse once every half cycle of the AC at a conduction angle set by the

voltage at the BCV input.

Upon power up the TRIG/ output defaults to the following

states:

For

LS7642 the TRIG/ is off.

For

LS7642FO the TRIG/ is on